Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps. 499-40-1, Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal, molecular formula is C12H22O11. In a Article，once mentioned of 499-40-1, Computed Properties of C12H22O11
Twenty-one adducts of the form AgX:ER3:L (1:1:1) (X = CF3COO (‘tfa’), CH3COO (‘ac’), E = P, As; R = Ph, cy, o-tolyl; L = 2,2?-bipyridyl (‘bpy’)-based ligand) have been synthesized and characterized by analytical, spectroscopic (IR, far-IR, 1H, 19F and 31P NMR) and single crystal X-ray diffraction studies. The resulting complexes are predominantly of the form [(R3E)AgL]+X-, with a trigonal EAgN2 coordination environment, the planarity of which may be perturbed by the approach of anion or solvent. The carboxylate anions have been found to be uni-, or semi-bidentate, or also completely ionic, as in the complexes [Ag(PPh3)(bpy)(H2O)](tfa) and [Ag(PPh3)(dpk · H2O)](tfa) (‘dpk · H2O’ = bis(2-pyridyl)ketone (hydrated)). The complexes Agac:PPh3:dpa (1:1:1) and Agac:P(o-tol)3:dpa:MeCN (1:1:1:1) are dinuclear, with bridging unidentate acetate and terminal unidentate dpa (‘dpa’ = bis(2-pyridyl)amine).
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Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics